Submission #134469

#	Time	Username	Problem	Language	Result	Execution time	Memory
134469		model_code	Remittance (JOI19_remittance)	C++17	100 / 100	391 ms	16136 KiB

remittance

#include <cstdio>
#include <vector>
using namespace std;

int main()
{
  int n;
  scanf("%d",&n);
  vector<long long> A(n),B(n);
  for(int i=0;i<n;i++){
    scanf("%lld%lld",&A[i],&B[i]);
  }
  bool F,G=false;
  for(int i=0;i<n;i++){
    G|=(B[i]>0);
  }
  if(!G){
    F=true;
    for(int i=0;i<n;i++){
      F&=(A[i]==0);
    }
  }
  else{
    bool loop=true;
    while(loop){
      loop=false;
      for(int i=0;i<n;i++){
	if(A[i]>B[i]){
	  long long t=(A[i]-B[i]+1)/2;
	  A[i]-=2*t;
	  A[(i+1)%n]+=t;
	  loop=true;
	}
      }
    }
    F=true;
    for(int i=0;i<n;i++){
      F&=(A[i]==B[i]);
    }
  }
  puts(F?"Yes":"No");
  return 0;
}

Compilation message (stderr)

remittance.cpp: In function 'int main()':
remittance.cpp:8:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&n);
   ~~~~~^~~~~~~~~
remittance.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld",&A[i],&B[i]);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45